im using smart and linksys router... no problems with my connection
assuming u have not changed the settings of the linksys, meaning ur linksys is on DHCP(as what u said):
1. check if the PC gets an IP address from the linksys router. HOW? get to the cmd prompt and type "ipconfig" ... it should, by default give 192.168.1.100 since linksys uses 192.168.1.0 network
2. if not then check TCP/IP settings on your PC... it should be set to Obtain IP address automatically..... if not then change it to obtain IP automatically
lets leave it up to here 1st... pls post for any progress...
we need to make sure the PC gets an IP from the router